Where can I see bounce rates on my Sent Messages?

If you want to know whether or not all the users you sent an email to receive it, you can check several places in the Bloomerang Volunteer system to see bounce rates. 

Both the Mid Level and the Deep level Email sent reports will show how many messages bounced. However, you are able to access this information from the Email Communications tab.    

email hist org

If you are looking to work within the system and find out how many bounced and which users were the ones affected by the bounces, you can check the Email History section of the Email Communications tab. From here you can see a list of all emails sent within the Organization, and click to see the details of each message. It will outline whom the message was sent to, and which of those users had the message delivered and which ones had it bounce.   

email hist org details